Patent US3763635A successfully refreshed from Google Patents.
US3763635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner construction
Assignee: Matsushita Floor Care Co
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Filing: 1971-09-30
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Granted: 1973-10-09
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Expires: 1991-09-30
Abstract
Abstract An upright vacuum cleaner construction having a one-piece housing defining means for housing the motor-driven fan and the dust-collecting bag. The housing is adapted to be pivotally carried on a base assembly defining a nozzle so as to dispose a handle secured to the housing suitably for manipulation of the vacuum cleaner by the user. The housing may be formed of molded plastic and may be provided with a flameproof enclosure surrounding the motor and electrical wiring in the lower portion thereof for preventing injury to the relatively flammable plastic housing portions. The lower portion of the housing may be cylindrical and the motor-driven fan means may be disposed coaxially thereof for pivoting coaxially on the base assembly. The fan means may be arranged to direct air from the bag space over the electrical wiring and motor so as to cool the motor and discharge the air to exteriorly of the housing away from the bag enclosing portion.
Inventors
- 👤 J Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:10
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
217 words
In an upright vacuum cleaner having a motor-driven fan means and a dust-collecting bag, structure comprising: a one-piece housing defining a first, lower space housing portion, and a second, upper space housing portion; means for mounting the motor-driven fan means within said first space housing portion, the portion of the housing defining said first space comprising a horizontal generally cylindrical wall means coaxially enclosing the motor-driven fan means, and having an open end and radial air-exhaust openings; flameproof tubular wall means defining a flameproof barrier covering the inner surface of said cylindrical wall means and having openings aligned with said air-exhaust openings thereof, and defining means for further exhausting air from said first space in a direction parallel to the axis of said cylindrical wall means through said open end thereof; and means mounting the dust-collecting bag within said second space housing portion, said housing further defining inlet means connected with the dust collecting bag for conducting air to the dust-collecting bag in said second space housing portion, and transfer duct means flow connecting said housing portions for conducting air from said second space housing portion externally of the dustcollecting bag to said first space housing portion through said fan means with said air-exhaust openings conducting air from said first space housing portion to the ambient atmosphere.
Claim 2
Dependent Claim
217 words
In an upright vacuum cleaner having a motor-driven fan means and a dust-collecting bag, structure comprising: a one-piece housing defining a first, lower space housing portion, and a second, upper space housing portion; means for mounting the motor-driven fan means within said first space housing portion, the portion of the housing defining said first space comprising a horizontal generally cylindrical wall means coaxially enclosing the motor-driven fan means, and having an open end and radial air-exhaust openings; flameproof tubular wall means defining a flameproof barrier covering the inner surface of said cylindrical wall means and having openings aligned with said air-exhaust openings thereof, and defining means for further exhausting air from said first space in a direction parallel to the axis of said cylindrical wall means through said open end thereof; and means mounting the dust-collecting bag within said second space housing portion, said housing further defining inlet means connected with the dust collecting bag for conducting air to the dust-collecting bag in said second space housing portion, and transfer duct means flow connecting said housing portions for conducting air from said second space housing portion externally of the dustcollecting bag to said first space housing portion through said fan means with said air-exhaust openings conducting air from said first space housing portion to the ambient atmosphere.
Claim 3
Dependent Claim
15 words
The vacuum cleaner structure of claim 1 wherein said housing comprises a molded plastic element.
Claim 4
Dependent Claim
24 words
The vacuum cleaner structure of claim 1 wherein electrical wiring connections are disposed in said first space housing portion adjacent the motor-driven fan means.
Claim 5
Dependent Claim
52 words
The vacuum cleaner structure of claim 1 wherein said flameproof wall means defines an end wall extending across said open end of such cylindrical wall means and having a plurality of axial passages defining the means for further exhausting air from said fan means axially outwardly from said first space housing portion.
Claim 6
Dependent Claim
30 words
The vacuum cleaner structure of claim 1 wherein said housing defines a distal end and includes a removable wall extending substantially from said cylindrical wall means to said distal end.
Claim 7
Dependent Claim
16 words
The vacuum cleaner structure of claim 1 wherein said flameproof wall means is formed of metal.
Claim 8
Dependent Claim
18 words
The vacuum cleaner structure of claim 1 wherein said flameproof wall means is removably secured to said housing.
Claim 9
Dependent Claim
33 words
The vacuum cleaner structure of claim 1 wherein said fan means is arranged to draw air from said second housing space and discharge it through said first space to externally of said housing.
Claim 10
Dependent Claim
52 words
The vacuum cleaner structure of claim 1 wherein said fan means is arranged to draw air from said second space housing portion and discharge it through said first space housing portion in thermal transfer association within said motor-driven fan means for cooling the motor to externally of said first space housing portion.
Claim 11
Dependent Claim
19 words
The vacuum cleaner structure of claim 1 wherein said flameproof wall means defines means for pivotally mounting the housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |